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Finding the Fourth Proportional to 689,626.71, 951,689.61 and 383,715.95

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Solution

The fourth proportional to 689,626.71, 951,689.61 and 383,715.95 is: 529,530.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,626.71 : 951,689.61 = 383,715.95 : x
  2. Step 2: Convert to fraction form
    689,626.71/951,689.61 = 383,715.95/x
  3. Step 3: Cross multiply
    689,626.71x = 951,689.61 × 383,715.95
  4. Step 4: Simplify right side
    689,626.71x = 365,178,478,047.83
  5. Step 5: Solve for x
    x = 365,178,478,047.83/689,626.71
  6. Step 6: Final answer
    x = 529,530.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.